MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity. The OpenCourseWare Initiative (OCW) has produced many free course materials on various subjects such as political science, urban planning, philosophy, etc. A site overview is available for MIT OCW. You can also browse courses by department or use the advanced search to locate a specific course or topic.